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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8980022 B1

PDFFull Text
Date of Patent:
Mar. 17, 2015

Filed:

Jan. 13, 2010

Case hardening steel, carburized component, and manufacturing method of case hardening steel

Applicants:

Kei Miyanishi, Tokyo, JP;

Masayuki Hashimura, Tokyo, JP;

Shuuji Kozawa, Tokyo, JP;

Manabu Kubota, Tokyo, JP;

Tatsuro Ochi, Tokyo, JP;

Inventors:

Kei Miyanishi, Tokyo, JP;

Masayuki Hashimura, Tokyo, JP;

Shuuji Kozawa, Tokyo, JP;

Manabu Kubota, Tokyo, JP;

Tatsuro Ochi, Tokyo, JP;

Assignee:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Yoshitoshi Takeuchi

Int. Cl.
CPC ...
C21D 9/52 (2006.01); C21D 8/02 (2006.01); C21D 9/00 (2006.01); C22C 38/08 (2006.01); C22C 38/44 (2006.01); C22C 38/22 (2006.01); C22C 38/00 (2006.01); C23C 8/32 (2006.01); C23C 8/26 (2006.01); C23C 8/30 (2006.01); C23C 8/24 (2006.01); C23C 8/20 (2006.01); C22C 38/02 (2006.01); B21J 1/02 (2006.01); C21D 6/00 (2006.01); C21D 9/32 (2006.01); C21D 9/36 (2006.01); C21D 9/38 (2006.01); C21D 9/40 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/28 (2006.01); F16C 33/62 (2006.01); C21D 1/32 (2006.01); C21D 1/58 (2006.01);
U.S. Cl.
CPC ...
C22C 38/02 (2013.01); B21J 1/02 (2013.01); C21D 6/002 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0257 (2013.01); C21D 9/32 (2013.01); C21D 9/36 (2013.01); C21D 9/38 (2013.01); C21D 9/40 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/28 (2013.01); F16C 33/62 (2013.01); C21D 1/32 (2013.01); C21D 1/58 (2013.01); C21D 2211/005 (2013.01);
Abstract

This case hardening steel has a chemical composition including, by mass %: C: 0.1 to 0.6%; Si: 0.02 to 1.5%; Mn: 0.3 to 1.8%; P: 0.025% or less; S: 0.001 to 0.15%; Al: over 0.05 to 1.0%; Ti: 0.05 to 0.2%; N: 0.01% or less; and O: 0.0025% or less, and further including, by mass %, one or more of Cr: 0.4 to 2.0%, Mo: 0.02 to 1.5%, Ni: 0.1 to 3.5%, V: 0.02 to 0.5%, and B: 0.0002 to 0.005%, and the balance consisting of iron and unavoidable impurities.

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